The figure shows how to implement an alarm buzzer in an LM3914 to warn about crossing the scale limit. The circuit can use other types of warning.
This circuit has some differences from the conventional types of control in which the delay in the...
This sound relay or Vox was found in 70s RCA documentation. SCRs can be common types today and...
This remote control for resistive loads using a triac appears elsewhere on this site. The circuit...